下列加氢裂化物料中，不含硫化氢的物料是（）。
A.循环氢
B.反应生成油
C.重石脑油
D.低压分离器气相
参考答案：C
The mother didn't know who the glass because it happened when she was out.
A．break
B．has broken
C．had broken
D．breaks
侃侃而谈kǎn kǎn ér tán
